Automatic multiple-switch-controlling machine



E. A. MARGESON AND C. D. HERROLD AUTOMATIC MULTIPLE SWITCH CONTROLLINGMACHINE.

APPLICATION FILED AUG-4, I920.

Patented'Man 14,1922.

6 SHEETS-SHEET I.

milnm I' I II III ii uIIIIIIIIIIIlIIIITIIII' IN l/E N TOQS.

A MAQGESON- g. 0. HEQQOL o.

A T TOQNE E. A. MARGESON AND C. D. HERROLD. AUTOMATICMULTIPLE SWITCHCONTROLLING MACHINE- APPLlCATlON man we, I923 1 ,409,561 Patented Mar:14, 1922.

6 SHEETS-SHEET 2.

INVE/VTGQS- E.A MAQGESON. C. D. HEEE ATTOQ E. A. MARGESON AND 0. n.HERROLD. AUTOMATIC MULTIPLE SWITCH CONTROLLING MACHINE. APPLICATION HLEDAUGJ4. 1920.

1,409,561. Patented Mar. 14, 1922.

6 SHEETS-SHEET 3.

M/VENTODS. EA. MAEGESOIV- BY am A r roe/w: x

E. A. MARGESON AND C. D. HERROLD.

AUTOMATIC MULTIPLE SWITCH CONTROLLING MACHINE. APPLICATIQN FILED AUG. 4,I920- 1,409,56 1. Patented Mar. 14, 1922.

6 SHEETS-SHEET 4.

IN VE N 7026.

5. MAQGE-SON- 0.0. HEQQOLD.

A r-ropwn E. A. MARGESON AND C. D. HERROLD. AUTOMATIC MULTIPLE SWITCHCONTROLLING MACHINE. V APPLIQATTON FILEYD AUG.4, 1920- ,409 561. aw te'M 1 1 2- 6 SHEETS-HEET 5.

EA. [meat-80M 0.0. HfQQOLD.

BY W

A 'TTO NEY.

E. A. MA RGESON AND C. D. HERROLD. AUTOMATIC MULTIFLE'SWITCH CONTROLLINGMACHINE.

. APPLICATKON FILED AUG=4. I920.

1,409,561 Patented Mar. 14, 1922.

6 SHEETS-SHEET 5- E. MA QGESO/V. C.

' H QEOLD.

'BY I INVEN 0229.

. EVERETT. AnGEsoN AND CHARLES im :HQRRQLD, dis-Air Jose, cnmifionuin,

. ASSIGNORS T0 ennrncnn ANNIE MAneEsoN, OF SAN JOSE, CALIFORNIA.

1,539,561. 1 Original application filed March 29,

To all who m itmag concern:

1 Beit' known that we, EVERETT :A 'MARcnsoN and GrIARLns-DAvm Hnnnow,citizens of theUnited States, residing at San Jose, in the county ofSanta Clara and State'of California, have invented a-new' andusefullmprovement in Automatic Multiple-Switch- Controliing Machines, ofwhich the following is a specification This invention relates tomultiple switch controlling machine and is zrdivi'sion of'our copendingapplication entitled Automatic multiple switchcontrolling niachine,filed March 29, 1920, Serial K013629580, I I

One of the objects of the present inventionis to provide an automaticmultiple switch controlling machine whereby several independent electriccircuits may be automatically controlled, and especially to v provide amultiple switch controllingmachine whereby one or more motor drivenstreet indicatin'gmachines maybe intermittently and independentlyoperated.

Another object ofthe invention is to provide a multiple switchcontrolling machine, an indicating machine and an electric motor fordriving the same and in conjunction therewith toprovide means on themultiple switch controlling machine for preparing a shunt" circuitaround the motor which is adapte'dto be closed by an automatic switch'on the indicating machine and opened after predetermined interval byanother automatic switch on. the multiple switch controlling machine; 1

- Further objectswill hereinafter "appear.

i The invention consists of the part-sand the" construction, combinationand arrangement of parts as hereinafter morefully described and claimed,having reference to the accompanying drawings, inwhich- V '-Fig. 1 isaside elevation of the automatic multiple switch controlling machine.

Fig. 2 is a front view :of the same, par

tially broken away'andpartially in section. I Fig.3 is a plan view ofthe indicating ma chine, V

Fig. 4 is a 81(16 elevation of the same v -L Fig..'5"1s a partialsldeelevation cf'a an automatic AUTOMATIC MU TIrLE-sw-r'rcri-cofiaRoLnnG MACHINE. 1

specification of peter te. I ,PateiltedfMar.

1920, Serial No. 369,780., Divided and his application filed August1920. Serial No. 401,153.

street car, showing: the applicationbf the invention. .1 r 1 Fig. 6 isanenlarged detail sectional view of the reversing switch drum:

Flg'. 7 1s a,w1r1ng diagram showing the connectionsformed between theindicating machines and the automatic multiple switch controllingmachine. K w T F'g.:8 is a section taken'on the line shown near'theright end of .Fig. 3. 4

' Referring to the drawings in detail, and particularly to Figs. 1 and2, which are the drawings of the automatic multiple switch controllingmachine, Alindicates ar-ma'in frame of suitableiconstruction, in whichis "journalled a sh'aft2. Turnably mounted on the shaft is adrumBandkeyed to the shaft or otherwise securedthereto-is a.- pair of rack gears4t, one on: each side of the drum.

The rack gears are right and left"hand,-or in other words,reversedflwith relation to eachother, I and both gears 'are' engaged. bypawlsfi, which are'carried by ;the-.drum; Formed :on the outerfaceof thedrum is a threaded or helix .6, and projecting {from the face of :theheliX-arevpinsor projections 7 which are adaptedto intermittently rotatea. pin gear =8 which is keyed but slidably V 'mounted'on shaftf9f- Thisshaft is supportedin journal. member 10 above the drum, and secured onone end of the. shaft is a wheel 11, on-which is formed six camprojections suchas'indicatedf at: 12. -;T here' are twelve pins v011%thepin. gear 8 and a twelfth. of 'aflrevolution is; therefore,transmitted'to-the pingearandtheshaft 9,to-

gether with the cam wheel 11 when the pin gear is: engaged by aprojection? carried by the helix. TheshaftgQ, together with the gearsat, and the drumfi, aremechanically driven. The drive providedconsistsofa flexible shaft, :13, which 1 is positively "driven from thecar 7 wheels bymeans V ofthe gears 14., (*See F 1g. 5;) Turningmovementim;

parted to thej fiexibleshaftis. transmitted through a jaw .or a pinclutch such. as shown at 15 to a shaft: 16 andjfrom tlal-isshaft to;

a vertically disposed. shaft. 17 ,1 whichfis jou'rnalled in themainiframeA; through a bevel gear train such; asshown at 1 8., S e-;-

cured on the shaft 17 is a worm 19, and inter-meshing therewith andsecured on one end ofthe shaft 2.is a worm gear 20. In other words apositive driving connection is formed between the car wheels and theshaft 2, the speed of the shaft 2 being however materially lesseneddu'eto thegear re duction provide'd'by the bevel gears 18 and the worm gears19. and 20. The reduced speed transmitted to the shaft 2 is'againtransmitted to the drum 3 through one or another 'of the rack gears 4and the pawls Fig. 2, it will be seen that a crank arm 22 is pivotallv.secured to the main frame A as'at 23. he upper end of this crank arm isengaged by the pin gear 8 when it has travelled a predetermined distancealong theshaft 9. A rocking'movement will thus be transmitted tothe'crank arm 22, causing its upper end to swing upwardly and its lowerend 24 inwardly. This will cause the lower end 24 to assume a positionin alignment with the adjacent or cooperating pawl 5, and as this isprovided with a raised cam projection 25 (see Fig. 1), it is obviousthat-passage of the pawl under the arm' 24 will cause depression of thecam end of the pawl and raising'of its opposite engaging end, thusfreeing the pawl with relation to"the.cooperating rack gear-andautomatically breaking the driving connection.

This automatic break between the drum and one or the other of itsdriving connectlons is necessary. For instance, if a car is travellingon a certain run and steep hills or slippery weather is encountered itis possible that the car wheels will slip while the drum'continuesrotating." This is objectionable as'it throws the drumor the pins car.-ried' on the helix out'of time with the car,

orin other words, causes streets to be an-- nounced or displayed beforetheir proper sequence as will hereinafter be described. Slippage of thecar wheels will under all conditions cause the drum to advance and itwill therefore cause it to display the street names too early. in factslippage might take place to such an extent as to display a street twoor, three blocks ahead of time of reaching the same. It is thereforeobvlous that-the drum'will turn its predetermined number of revolutionsbefore the end'of the run is reached and that to correct the slippage,it is only necessary to automatically disconnect the driving connectionbetween the'gears 4 and the drum. With the driving connectionautomatically broken by means of the crank arm 22,.it is possible forshaft 2 to turn without transmitting further movement to the drum. Thedrumtherefore' re mains stationary untiltl1e-carreaches the end of itsrun and any slippagethat may have taken place is thus corrected as thecar willnow be reversed and will travel in the opposite'direction.

Manually actuated means hasalso been provided for correcting theposition of the drum. This is accomplished by first throwing out thepin, clutch 15, for instance by means of arocker arm 15 and-a connectinglever 15*. A hand crank 26 is then grasped and rotated in the directiondesired. This hand crank is secured on a. shaft 27 journalled in thebase of the main frame and this shaft in turn carries a sprocket gear28,

which transmits rotation to the shaft 17 through, means of achain'29-and a sprocket.

gear 30 secured on the lowermost end of shaft 17. This permits the drumto be turned until. the correct street is indicated and is only usedwhen the car is side-tracked for some reason or another or possiblyafter having traversed another route. It may-of course be renderedentirelyinoperableunder these conditions by disconnecting; the clutch15.

. The construction of the'drum, the mounting and driving of the same,and themeans for adjusting or correcting its position has now beendescribed, and it is therefore thought that the function of the camwheel 11 should follow. This wheel, as previously 7 stated, is providedwith siX cams 12 and is intermittently rotated onertwelfth of arevolution. Pivotally attached to the main frame, as at 3]., at a pointabove the shaft 9, is a pair of switch arms indicated by numerals 32 and33. The switch 32 makes and breaks circuits hereinafter to be describedbetween the double contacts 34: and

35, while the-switch arm makes and breaks circuits between the doublecontacts 36 and '37. The I switches 32 and 33 will hereinafter be knownas the master switches and the circuits established or broken therebywill further be'described. The switch arms 32 and 83 are moved from oneposition to another by means of the cams 12 and as these onlyturnone-twelfth of a revolution when actuated, it'is obvious that theswitch arm 32 will either engage the contacts'35,

for instance when resting in'arecess of'thev cam 12, and that it willcontact with'the terminals 34 when engaged by a. cam. The

operation of th'e'switch arm 83 is si'1n'ilar,

and as the switch arms are opposite to each other theywillsnnultaneously move in one direction or another, thus engaging thedoumittently change the position of the master switches 32 and 33. Themachine is however provided with a reversing switch whichcooperates-with the switches 32 and 33, and also with other switches tobe hereinafter described. This switch is generally indicated at B. Itconsists of a drum 38, which isi supp'orted by a shaft '39.- Thisshaftis continuously rotated from shaft 17 bymeans of aworm gear drive17 but rotary movement is only transmitted to thedrum whenever thestreet car starts back at the end of its run. This is accomplishedasfollows:

Secured interiorv of the drum on the shaft 39 is a pin 40, andinterposed between the gagement with a collar 42 secured on the shaft. Afriction drive or connection is thus formed between the drum. and theshaft which becomes operable to turn the drum one-fourth of a revolutionwhenever the direction of rotation of shaft 17 is reversed. This will bemore easily understood when it is stated that a segment-like lug 43 issecuredon one end 'of the drum, which is adapted to engage the upperportion of the frame at the points indicated at 44 and 45. For instanceif the shaft 17 is turning in' -'a direction which would cause thefriction drive formed between shaft 39 and the collar 42 to turn in thedirection of arrow a, (see Fig. 1) then drum 38 will rotate until thestop segment 43 engages the point.

or stop 44 formed by the frame; If the direction of shaft 17 isreversed, then it-is obvious that the rotation of shaft 39 will bereversed and that the friction drive will thus cause the drum to revolvein a direction op'p'osite'to arrow at and it will revolve in thisdirection untilthe segment 43cmgages the point of the main frameindicated at 45. An approximate one-fourth of a revolutioii thusautomatically transmitted to the reversing switch drum whenever'thedirection of rotation of shaft 17 is changed hides the direction ofrotation of shaft 17 is only changed when the car is reversechit canreadilybe seen thatthe reversing drum or switclronly changes itsposition at each end of a given route diate points."

or run, or at interme- The function of the reversing switch and itscooperation with the master switches 32 and 33 will hereinafter bedescribed. may, however; be stated that the drum is constructed ofinsulating material such as shown in Fig. 6 and that it carries in alltwenty-two segments which are insulated therefrom These segments aremore clearly illustrated in Fig; 7 EtIlCl' \Vlll hereinafter be referredto by reference numerals; The segments are engaged by sixteen separate'.

springiactuated contacts, there being eight on each sideof the mainframe as indicated at C and D.-

automatic multiple switch controlling machine, it is thought necessary tc-give a brief '4 and is constructed as follows: n

46 indicates a base platoon which is secured a-pa ir of frame sections47 and 48. Suitably journalled'in said frame area pair of rollers 49 and50 and apair of idlers 51 and 52. 53 indicates a belt constructed of anysuitable material such as paper or fabric. This belt is carried'by therollers 49 and 50 and is guided by theidlers 51 and 52. One end of thisbelt is secured to the roller 49'and the opposite end to the roller 50.The rollers willr; therefore alternately serve 'as drivers and receiversand as the belthasstreet or station names printed or-otherwise formedthereon, it is obvious that an intermittent movement must be transmittedto the rollers and the belt carried thereby to permit each name to besuccessively-'- displayed through an'opening54, which isformed iniacasing-55 enclosing the entire mechanism:

The rollers 49 and'50 are in this instance driven by means of anelectricmotor :56 and this drive can be traced as follows:

57 indicates a horizontally positioned shaft which is journalled asat 58in abraoket member'59 secured upon the base. Secured on one end of theshaft is abevel gear .60 which intermeshes with a similargear .61 uponthe motor shaft, and securedfto the opposite end of the shaft 57 is aworm gear 62-.which intermeshes wit-h a worm wheel 63. The gear 63 issecured on a shaft64 and this is in turn journalledin the main frame" asindicated at 65., Loosely mounted on the shaft 64 is a. pair ofsprocketuwhee'ls 66 and 67 and connectingsaid sprockets'with a pair ofsprock'ets 68' and 69 are endless driving chains 71 and 70.Tlie'respective chains" andv sprocket-s .are provided for the,

purpose of drivlng: one or another of the belt plished as follows: we eSuitably securedon the inner faces of the sprockets 66 and 67 arepins'66 'and 67 diate the sprockets 66and-67,.y,is;a clutchsu-pportingrolls 49 and 50'and this is aCCOIiIf Turnably mounted on theshaft 64,- intermemember 72 and. projecting from; either end 10." Tofully understand the operation of the V clamp arms 76, the tension-ofwhich may lac-regulated by a screw 77.

The motor 56 is of the series wound type and is reversible and istherefore capable of transmitting power to shaft 57 in either direction.A drive transmitted gears 60, 61, 62 and 63, in one direction will firstcause the pin to travel from one end of slot '7 5, formed in the clutchsleeve, to-the other. This causes the sleeve to move lengthwise of theshaft64, pulling pin 74 into engagement with pin66' on sprocket 66. Thelongitudinal movement .of .the sleeve takes place while pin 75 travelsfrom one end of the slot to the other, sleeve 72 being prevented fromrotating at this moment for the simple reason that it is held againstrotary movement by the spring actuated clamp arms. The frictionalengagement of said arms is however not sufficient to hold the sleeveagainst rotation when pin 75? reaches the opposite end of the slot.

Power will therefore be transmitted through shaft 64, pins 75, sleeve72, and pins 73 and 66, to sprocket 66, which in .turn transmits powerthrough chain 70 to the sprocket 68 and the'roller 49. The belt 53 willthus unwind with relation to roller 50 and will pass over the idlers 51and 52 to the roller 49 upon which it is wound, the

sprocket 67 being loosely mounted on the shaft 64 will in this instanceact as anidler and will otherwise be inactive as far as transmittingpower is concerned, this being" of course true only when power is beingtransmitted to the roller 49. It the direction of rotation of the motoris reversed it should be obvious that pin 7 5 will immediately travel tothe opposite end of the slot and thereby force the sleeve 72longitudinally into engagement with the sprocket 66. Power will then betransmitted through shaft 64, pins 74 and 67 to the sprocket 66 andthrough chain 71 power will be transmitted to sprocket 69 and the roller50 driven thereby. The direction of. travel of the belt 53 will thus bereversed and will wind itself about the roller 50 and willsimultaneously unwind with relation to the roller 49.

The reversible motortogetherwith the automatic clutch indicated at 72makes it possible to drive the belt in either direction. This is ofgreat importance when the indicator is employed in street car service asit is necessary' to drive thebelt in one direction:

when the car is travelling in one direction and it will consequently benecessary to reverse the travel of the beltwhenrthe car is returning.The reversing of the motor is automatically accomplished by the mutipleswitch controlling machine previously described and means have also beenprovided for automatically opening and closing the circuits of the motorto produce or transmit an intermittent drive throughthe belt 53 throughwhether this be travelling in one'directionor another. Thisis'accomplished in the. following manner: 1

By referringto Figs. 3 and 4, it can be seen that the names of thestreets are printed or otherwise applied to the surface of the belt.Each street name is brought into reg, ister with the display opening orwindow 54, formed in the frontof the casing 55, and means have beenprovided for auto-' matically stopping the belt and motor the moment astreet name is brought into register with said window. and. 81 indiratein general a pair oil-"switches. They are operated bvthe belt 53'through the following means: Each switch consists of a. pair ofspringcontact members 82 and 83, and pivotally mounted on the main frameasv at 84 and 85 is a pair of rocker arms 86 and 87, one for eachswitch. Suitably secured to the outer end of each lever arm is a roller.88, and secured on the opposite edges of the belt area plurality ofraisedbuttons or projections 89 and 90, the projections 89 being sopositioned as to engage withthe roller on arm 86, while 'the'proiections90 will engage with the roller on the arm 87. There is one projectionfor each street and name, and these are staggered with relation toeachother, that is projection 89 which registers with M Street (see Fig. 3)is offset with relation to projection 90 on the opposite side of thebelt, which registers with N Street, similarly projections 89 whichregisters with I Street is offset with relation to projection 90 whichregisters with Street, etc. a y

- The inner end of. each rocker arm is turned outwardly as indicated at91 to bring the end of the rocker arm directly above the flexiblespringcoutact: members off the respective switches 80 and 81,- withwhich they are connected. The operation of this part of the mechanismwill be as follows:

Motor 56 having been started will. trans init movement-to drivethebelt53. The belt moving in a certain direction will consequentlybring one ofthe buttons or projections into engagement with roller 88 on'arm. 86,andwill'rock this on the pivot 84, cansing the outer end to movedownwardin the direction of arrow 7), and force the fleirible 7 p contacts82:and 83 of switch SO'into engagement witheach other, the buttons 90 onthe oppositeside of the belt being oil'- set with relation to buttons89, which are now in register with roller 88, will consequently permitarm 87 to remain in raised position and the contacts 82- and 83 orswitch 81 will thus remain in normal or open position.

The switches 80 and 81 are automatically 7 openedor closedt-hrough meansof the buttons or projections 89 and .90 and the arms 86 and 87. Theseswitches are connected goazsci in such a manner that they willalternately close a by-pass or shunting circuit around the armaturewhich is automatically opened by the multiple switch controlling machineas will hereinafter be described, having reference to the wiring diagramshown in Fig.

4. This diagram illustrates the connections formed between theindicating machine and the multiple switch controlling machine and infact illustrates the wiring or connection between two indicatingmachines, for instance, one at each endv of the street car and themultiple switch controlling machine. The circuits between themultiplerswitch controlling machine and the driving motor of eitherindicating machine are identical and the description of one series ofcircuits is therefore thought sufficient. 'Thesecircuits can be tracedfollows:

The automatic multiple switch cont-rolling machine controls sixcircuits, each of which is reversible, there being three separatecircuits for each indicating machine. WV-e will first consider a closedcircuit through one of the indicating machine driving motors. The motorsemployed, as previously described, are series wound. Current coming fromthe trolley line passesthrough a resistance 92, next through the fieldof the motor 56 and then passes through a wire which is connected with acontact F The current then passes through a segment 93 on the reversingdrum, a bridge wire 94, a segment'95, contact A and then reaches oneterminalof the armature as at A The current then passes upwardly throughthe terminal. A and wire A which is attached to acontact A; The currentthen passes through segment 93, bridge wire 94:, segment 95, and finallyenters the rail or ground circuit through contact Gr. This indicates theclosed or operating circuit formed through the motor. This circuit ofcourse causes rotation of the armature and power is thereby'transmittedto move the street displayingbelt. This movement of the belt is howeverlimited as the projections 89 or "90 on the belt are provided forby-passing or shunting the circuit around the armature' This circuit canbe treated as follows:

Current from the trolley passes through the resistance 92, the armaturefield 56, and then passesthrough a wire which is connected with contactF segments 93 and 95, bridge wire 94, and contact A Current then isshunted through a wire 97 andthe switch 80 of one of the indicatingmachines. The contacting points of said switch are connected by awire 98with a. contact J which engages segment 99. The current passes throughthe segmentand contact K which is connected withone of the terminalsofthe master switch 33, by means of a wire 100 Current then passesthrough the ter;

minals or the master switch and wire 101, which is connected withthecontact; A The current then passes through the se cuts 93', 95 bridgewire 94:, and-contact I whichris connected with the rail or the ground.From this it can be seen that. the current is grounded without passingthrough the armature. i

It is-well known thatshunting or shortcircuiting of the armature of amotor, the fieldcircuit remaining excited, provides an instantaneousbrake for said rotating armature. This is due to the fact that therotating armature of any direct current motor generates a powerfulcounter electro-motive force. Shorting the armature sets up a powerfulmomentary field about the armaa ture which acts as a brake. Thiscondition takes place in the present instance the moment the contacts ofthe switch are closed as abypass. or shunting circuit is. formed for thecurrent. In other Words the current flow throughthe field stillcontinuesbut all flow through the armature is interrupted due to thecircuit of less resistance established by the switch 80. Instantaneousstoppage of the armature is therefore produced and similarly themovement ofthe display belt.

lVhile the current is shunted around the arshorting circuit through thecontacts 37 on the master switch 33, adapted to-be; closed by switch 81.The moment the .master switch is thrown the current flowthrough thearmature is again established and it is therefore obviousthat movementwillgagain be transmitted to the belt by which the street names'aresuccessively displayed. ."Further that the belt will continuemovinguntil the projections thereon actuated switch 81, and

thereby completes the shunting circuit prepared by the master switch 33when it engaged the contacts 37. Movement of the displaying belt willbring projections 90,

formed thereon, into position Where one or another of 'thesame willactuate the con tacts of the switch. 81 and close the circuit throughthe same. This second shunting being completed, instantaneous stoppageand further revolution of the motor is .c'aused. The second shuntingcircuit can be tracedas follows: f

Commencing with the trolley the current again'passes through theresistance 92,.the

motor field 56 and the wire which connects the same with thecontact FThecurrent then passes throughsegment 93, .945,

which connects with the master switch terminals 37. The current thenpasses through the said terminals and out through wire 101,

which is connected with the contact A segment 93, bridge 94, contact 95,and contact G, which is connected with the rails or the ground. Thesearethev three main circuits and they are automatically actuated by themultiple switch controlling machine and also by the movement of thedisplay belt in the indicating machine;

The function of the switches and 81 carried by the indicating machineand actuated by the projections on the display belt is to close theshunting circuits established by the master switch 33, and thereforecauses instantaneous stoppage of the driving motor 56. The function ofthe multiple switch controlling machine is in realitythat of actuatingthe master switch 33, which prepares the two shunting circuits describedor opens said circuits.

lVe have other functions to consider, that is the operation ofthe'reversing switch'or drum. This drum, as previously stated isautomatically turned approximately onefourth of a revolution when thecar reverses at one end, of a predetermined course or run. The functionsof the reversing switch or drum is that of automatically reversing thecircuits through the motors whereby the indicating machines are driven,that is the street displaying belt travels in one direction when the caris travelling in one direction and it is therefore necessary to reverseits direction of travel when the car returns or reverses its directionof travel. The function of the reversing switch or drum is therefore,first that of automatically reversing the circuits through the motors,and secondly that of reversing the shunting circuits which circuitsin'turn are controlled by the belt actuated switches 80 and 81, andthedoubl master switches It also serves another function hereinaftertobe described. iVhen the drum assumes a position opposite to that shownin Fig. 7, it'will be seen that when the motor again continues itsrotation, the flow through the armature will be in the oppositedirection and that the direction of rotation will therefore be reversed.This circuit can be traced as follows:

Current entering from the trolley passes through the resistance 92, thefield coil on the motor 56, and the wire which connects the'same withthe contact F The current then passes through a segm ent 110 and outthrough contact A and it then passes through wire A and enters theterminal A on 'the armature, passing out through the oppos'lte terminalA itenters contact A which engages "a segment "111. "It then passesarmature of 'the' motor.

throughthis segment and out through contact G which is connected withthe ground By tracing the shunting circuits as shown. through wire 97 itwill be seen that the current flowing through these is also reversed.The cycle of operation in each instance will therefore be similar tothose previously described the only difference being that the currentflow is reversed. v

The main actuating drum carrying the helix is not provided with pins atterminal nor at intermediate return points and means .must thereforenecessarily be provided for imparting movement to the street displayingbelts'so that the proper street named may be displayed. The reversingswitch is em ployed for this purpose and in such instances only servesone of the functions of the master switch, to-wit, that of opening theshunting circuits.

By referring to Fig. 7 it will be seen that the contacts K and'J engagethe contact- 99 when the reversing switch assumes one posi- "flowthrough the contactsK and J? will therefore be momentarily interruptedwhile the switch is changing position. tacts K andJ control'the shuntingcircuit around the armature "and as this circuit is momentarilybrokenduring the movement of the switch, it is obvious that the current istemporarily permitted to flow through the This is therefore started andmovement is simultaneously transmitted to the display belt in theindicating machine, themovement imparted being sufficient to'move the,projections formed thereon out of engagement with the switch 80. Theshunting circuit which was'fir'st momentarily opened is therebypermanently opened and it will remain open until the belt has travelledto display the proper street, and it will here be stopped due to thefact that the opposite projection 89 on the belt will now engage thecontacts on the switch 81 and thereby close the shunting circuit in anormal manner. The reversing switch'will in thismanner perform one-ofthe functions of the masterswitch or perform the same function as thatofthe pins on the helix and as no pins are provided at terminal or'interseen that the automatic multiple switch'con trolling machine controlssix circuits, three for each indicating-machine and that the currentflow through these circuits is re versed when the position of thereversing switch drum is changed further the switches The con- Byreferring to the same carried by the respective indicating machines. andactuated bytheprojeetions on the respective belts serve the'function ofcom pleting the shunting circuits established by the master switches anc3.3, and that the function of the automatic multiple switch controllingmachine-is in reallty that of po- 7 sitioning saidimaster' switches so.that they either prepare the shunting circuits or open the; same, saidmultiple switch controlling machine having still another function,towit, that of automatlcallyreversing all circuits whenthe end'of a runs reached, and

that of functioningas; a masterswit ch at termmal'or intermediate returnpoints.

The -multiple' switch controlling machine really covers thc subjectmatter of the pres ent invention, but as its operationto a certainextent is-Idependent-upon the switches a multiple switch controllingmachine, an

indicating machine, an electric motor for driving the same, meansactuated by the multiple switch controlling machine for preparinga shuntcircuit around the armature of the motor and for opening said circuit.

3. In a device of the character described a multiple switch controllingmachine, an indicating machine, an electric motor for driving the same,means actuated by the multiple switch controlling machine for preparinga shunt circuit around the armature of the motor, and means on theindicating machine for closing said shunt circuit.

4. In a device of the character described a multiple switch controllingmachine, an indicating machine, an electric'motor for driving the same,means actuated by the multiple'switch controlling machine for preparinga shunt circuit around the armature of the motor, means on theindicating machine for closing said shunt circuit, and means actuated bythe multiple switch controlling machine for openingsaid circuit.

5. In a device of the character described a multiple switch controllingmachine, an

indicating machine, an electric motor for driving the same, meansactuated by the multiple switch controlling machine for preparing ashunt circuit around the armature of the motor, means on the indicatingmachine for-closing said shunt circuit, means actuated by the multipleswitch controlling machine for opening said circuit, and other meansactuated by the multiple switch controlling machine for; reversing saidcircuit;-

"6; In a device of the charactergdescribed multiple switch. controllingmachine, I an indicating machine,fanelectric-motor for -cli'iv'ing'-thesame, means actuated by'the multiple switch controlling machine forpreparing a shunt circuit around thearma-.

turezof the motor, means on the indicating machine for closing "saidshunt circuit, means actuated the multiple switch controllingmachiiiewfor opening said circuit, a reversing switch automaticallyoperated by the multiple switch controlling machine, and means onsaid'switch for opening the shunt circuit. I v r 7 "Inadeviceo-f thecharacter described a multiple switch-controlling 'machine', an.

indicating machine, an electric motor for driving theesame, a masterswitclrin the controlling machine, an automatically actuated -switch'inthe indicating machine adapt edto icloseashunt circuit around-thearmature of-the motor, and means actuated'by'the multiple switchcontrolling machine "for automatically changing the position of the nl-aster switch toopen said shunting circuit; Y 18 111, a device: ofthecharact'er described a multiple -switch controlling machine,*- anindicating machine an electric motor for driving; thelsame," a masterswitch in the controlling machine, an automatically actuated switch inthe indicating machine adapted to close a shunt circuit around thearmature of the motor, and means actuated I by the multiple switchcontrolling machine for automatically changing the position of themaster switch to open said shunting circuit and simultaneously prepare asecond shunting circuit. 1

9. In a device of the character described a multiple switch controllingmachine, an indicating machine, an electric motor for driving the same,a double throw'switch in the controlling machine adapted to open andalso adapted toprepare a shunting circuit around the armature of themotor, and an automatically actuated switch on the indicating machineadapted to close the shunting circuit prepared by the double throwswitch.

10. In a device of the character described a multiple switch controllingmachine, an indicating machine, an electric motor for driving the same,av double throw switch in the controlling machine adapted to open andalsoadapted to prepare a shunting circuit around the armature'of themotor, an automatically actuated switch on the indicating its machineadapted-to reverse the current flow through the motor and also throughthe ing machine adapted to close'the shunting circuit preparedby-thedouble throw switch, and a reversing switch in the controlling machineadapted to reverse the current flow throught the motor and also throughthe shunting circuit, said reversing switch, when changing position,also adapted to open the shunting circuit.

'12. In a device of the character described a. multiple switchcontrolling machine, an indicating machine, an electric motor fordriving the same, a shunt circuit formed around the armature ofthemotor,a double throw master switch in the controlling machine adapted to openthe shunting. circuit and also adapted to prepare theshunting circuitaround the armature power driven means adapted to intermittently changethe position of the master switch, an automatically actuated switch invthe indicatingmachine adapted to close the shunting circuit prepared bytheamasterswitch, a reversing switch in the controllingrmachine, andmeans actuated by power driven means for automatically changing theposi- 7 tion of the reversing switch and thereby reverse the currentflow through the armature of the motor. r

l3. In a device of the character described amultiple switch. controllingmachine, an indicating machine, an electric motor for driving thesame, ashunt circuit formed 5 prepared by the master switch, and asecondautomaticallyactuated switch in the indicating machine adapted to closethe next shunting circuit prepared by the 'master switch and said masterswitch automatically opening the shunting circuits closed by theindicating machine. switches.

In testimony whereof we have-hereunto set our hands in the ingwitnesses.

' EVERETT AQMA'RGESON. CHARLES DAVID HERROLD.

. WVitnesses: r

E. LENNON, MILDRED AnJo.

presence of two subscrib-

